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Income Taxes - Provision for Federal Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Tax Provision (Benefit)      
Current income tax benefit (provision) $ (3,505) $ (5,521) $ (3,803)
Deferred income tax provision (provision) 195 (252) 729
Provision for federal income taxes $ (3,310) $ (5,773) $ (3,074)
Effective Income Tax Rate Reconciliation      
Statutory corporate tax rate 21.00% 21.00% 21.00%
Research tax credits (1.50%) 0.00% 0.00%
Equity investments in affordable housing projects (0.10%) (0.10%) (0.10%)
Valuation allowance 0.70% 0.00% 0.00%
Other 0.30% (0.20%) (0.20%)
Effective tax rate 20.40% 20.70% 20.70%